Ciencia y Tecnología

Análisis de eficiencia en sistemas de cómputo de alta performance reconfigurables

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Análisis de eficiencia en sistemas de cómputo de alta performance reconfigurables Morales, Martín; Kunysz, Eduardo Jose; Osio, Jorge Rafael; Rapallini, Jose Antonio El objetivo de este trabajo, es presentar la arquitectura y características de un sistema para el estudio de las nuevas técnicas de procesamiento paralelo en el desarrollo de sistemas de cómputo de aplicaciones específicas de altas prestaciones. Como opción en la optimización de rendimiento y reducción en los consumos energéticos se propone una alternativa que representa un nuevo paradigma en el desarrollo de supercomputadoras. Dicha alternativa, viene de la mano de tecnologías de arreglos de compuertas lógicas formando parte del cómputo de alta performance reconfigurable (HPCR).; The purpouse of this project is to introduce the architectures and characteristics for new technics of high performance computing paralleling process. As an option of optimization, performance and high energy efficient is propose a new paradigm in supercomputers design. This alternative has came with logic array technology as a part of high performance reconfigurable computer (HPRC).

Ciencia y comunicación: Una experiencia de producción audiovisual en el marco de políticas públicas inclusivas en Argentina

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Ciencia y comunicación: Una experiencia de producción audiovisual en el marco de políticas públicas inclusivas en Argentina; Ciência e comunicação: Uma experiência de produção audiovisual no âmbito das políticas públicas inclusivas na Argentina; Science and Communication: An Experience with an Audiovisual Production within the Framework of Inclusive Public Policies in Argentina Chaparro, Maria Gabriela; Conforti, María Eugenia; Giacomasso, Maria Vanesa En este trabajo se analiza la creación de un material audiovisual de divulgación científica posibilitado por una serie de políticas públicas llevadas a cabo en la última década en Argentina. El objetivo central del artículo es mostrar la relación ineludible entre la agenda del Estado en materia de comunicación, ciencia y tecnología, y la efectivización de proyectos de comunicación de contenidos científicos. La experiencia que aquí se presenta consiste en la producción de una miniserie televisiva realizada con recursos de una universidad pública del interior del país, que aborda temas de arqueología e historia de la región pampeana e incluye diversas voces vinculadas con la identidad local.; Este trabalho analisa a criação de um material audiovisual de divulgação científica, possibilitado por uma série de políticas públicas desenvolvidas na última década na Argentina. O objetivo central do artigo é mostrar a relação incontornável entre a agenda do Estado em termos de comunicação, ciência e tecnologia, e a efetivação de projetos de comunicação de conteúdos científicos. A experiência aqui apresentada está relacionada à produção de uma minissérie de televisão realizada com recursos de uma universidade pública do interior do país, que aborda temas de arqueologia e história da região dos pampas e inclui várias vozes relacionadas à identidade local.; This paper analyses the creation of a science popularization audiovisual work made possible by a series of public policies carried out in the last decade in Argentina. Its central objective is to show the unavoidable relationship between the State’s agenda with regard to communication, science and technology, and the implementation of projects for communicating scientific content. The experience that is here presented is the production of a television miniseries made with resources from a public university from the interior of the country. This miniseries addresses subjects related to archaeology and history from the Pampas region and includes diverse voices connected to its local identity.

Synthesis and characterization of nanoparticulate silica with organized multimodal porous structure impregnated with 12-phosphotungstic acid for its use in heterogeneous catalysis

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Synthesis and characterization of nanoparticulate silica with organized multimodal porous structure impregnated with 12-phosphotungstic acid for its use in heterogeneous catalysis Morales, María Dolores; Frenzel, Romina Alejandra; Romanelli, Gustavo Pablo; Pizzio, Luis Rene Mesoporous silica (MESSI) nanoparticles with ordered mesoporous frameworks were successfully obtained using the triblock copolymer P123 as the mesoporous template and agar as micropore former. The agar/TEOS ratio influences the specific surface area (SBET) and the micropore area (SMIC). The SBET values increase with the increment of the agar/TEOS ratio used in the synthesis. SAXS (small angle X-ray scattering) patterns and TEM (transmission electron microscopy) images of MESSI samples reveal the presence of a 2D hexagonal mesopore array. The study of all the materials impregnated with PTA by 31P NMR and FT-IR confirmed the existence of undegraded [H3-XPW12O40](3−X)− and [PW12O40]3− anions interacting with the ≡Si-OH2 + groups. The potentiometric titration results show that the MESSI-2PTA solids present very strong acid sites and that both the acid strength and the number of sites increase with the increment of the PTA amount in the samples. The performance of MESSI-2PTA materials as catalysts in the solvent-free synthesis of a series of substituted 3H-1,5-benzodiazepines was evaluated. The yields achieved were high, without formation of by-products resulting from competitive reactions or decomposition products, so the prepared materials are highly selective and reusable catalysts.

Alpha 1 adrenergic receptor-mediated inflammatory responses in human testicular peritubular cells

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Alpha 1 adrenergic receptor-mediated inflammatory responses in human testicular peritubular cells Rossi, Soledad Paola; Walenta, Lena; Rey Ares, Veronica; Köhn, Frank-Michael; Ulrich Schwarzer, J.; Welter, Harald; Calandra, Ricardo Saul; Frungieri, Monica Beatriz; Mayerhofer, Artur Stress activates the sympathetic nervous system and is linked to impaired fertility in man. We hypothesized that catecholamines by acting on testicular cells have a role in these events, possibly by fostering an inflammatory environment. The cells of the wall of seminiferous tubules, human testicular peritubular cells (HTPCs), express adrenergic receptors (ADRs) α1B, α1D, β1 and β2. A selective α1-ADR agonist, phenylephrine, increased intracellular Ca 2+ -levels in cultured HTPCs and induced COX-2, IL-6 and MCP-1 mRNA expression without affecting IL-1β mRNA. These changes were paralleled by a significant increase in the secretion of IL-6 and MCP-1. Epinephrine was also effective, but salbutamol, a selective β2-ADR agonist was not. Our results suggest that stress-associated elevation of catecholamines may be able to promote inflammatory events by targeting peritubular cells in the human testis. Blockage of α1-ADRs may therefore be a novel way to interfere with stress-related impairment of male reproductive functions.

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